bergquist
81 lines
1.8 KiB
Go
81 lines
1.8 KiB
Go
package graphite
|
|
|
|
import (
|
|
"bytes"
|
|
"encoding/json"
|
|
"fmt"
|
|
"io/ioutil"
|
|
"net/http"
|
|
"net/url"
|
|
"strconv"
|
|
"time"
|
|
|
|
"github.com/grafana/grafana/pkg/components/simplejson"
|
|
"github.com/grafana/grafana/pkg/log"
|
|
m "github.com/grafana/grafana/pkg/models"
|
|
"github.com/grafana/grafana/pkg/util"
|
|
)
|
|
|
|
type GraphiteClient struct{}
|
|
|
|
type GraphiteSerie struct {
|
|
Datapoints [][2]float64
|
|
Target string
|
|
}
|
|
|
|
var DefaultClient = &http.Client{
|
|
Timeout: time.Minute,
|
|
}
|
|
|
|
type GraphiteResponse []GraphiteSerie
|
|
|
|
func (client GraphiteClient) GetSeries(rule m.AlertJob, datasource m.DataSource) (m.TimeSeriesSlice, error) {
|
|
v := url.Values{
|
|
"format": []string{"json"},
|
|
"target": []string{getTargetFromRule(rule.Rule)},
|
|
"until": []string{"now"},
|
|
"from": []string{"-" + strconv.Itoa(rule.Rule.QueryRange) + "s"},
|
|
}
|
|
|
|
log.Trace("Graphite: sending request with querystring: ", v.Encode())
|
|
|
|
req, err := http.NewRequest("POST", datasource.Url+"/render", nil)
|
|
|
|
if err != nil {
|
|
return nil, fmt.Errorf("Could not create request")
|
|
}
|
|
|
|
req.Body = ioutil.NopCloser(bytes.NewReader([]byte(v.Encode())))
|
|
|
|
if datasource.BasicAuth {
|
|
req.Header.Add("Authorization", util.GetBasicAuthHeader(datasource.User, datasource.Password))
|
|
}
|
|
|
|
res, err := DefaultClient.Do(req)
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if res.StatusCode != http.StatusOK {
|
|
return nil, fmt.Errorf("expected httpstatus 200, found %d", res.StatusCode)
|
|
}
|
|
|
|
response := GraphiteResponse{}
|
|
|
|
json.NewDecoder(res.Body).Decode(&response)
|
|
|
|
var timeSeries []*m.TimeSeries
|
|
for _, v := range response {
|
|
timeSeries = append(timeSeries, m.NewTimeSeries(v.Target, v.Datapoints))
|
|
}
|
|
|
|
return timeSeries, nil
|
|
}
|
|
|
|
func getTargetFromRule(rule m.AlertRule) string {
|
|
json, _ := simplejson.NewJson([]byte(rule.Query))
|
|
|
|
return json.Get("target").MustString()
|
|
}
|